Gyro Blade

Gyro Blades are giant top-like statues that were literaly used as decorations for the Fortuna Castle. But they can be "animated" with the use of a material known as Anima Mercury. Gyro Blades were found inside the different rooms of the castle (In fact, all rooms in the 1st floor have Gyro Blades). Nero can use these Gyro Blades to destroy reflective objects like Gyro Doors, or a Gyro Coffin. They can also be used to kill any demon upon contact.

Appearance
Gyro Blades are made up of some alloy mixture composing iron, stone, and metal. They are large top-shaped figured armed with blades, thorns, and spikes. When not activated their spikes rest vertically on the floor, while their tips are being pinned downed. When activated via the Anima Mercury, a blue flame rests on their top, their blades expand on their sides, at the tip comes out, making the Gyro Blade to float.

Gameplay
Aside from destroying large structures, the Gyro Blade also offers a powerful blow when it hits a demon, killing it and making it explode. The blades can also be strenghtened by hitting the Gyro Blade with the Red Queen, the blades then start spinning. This spinning of blades increases the power and speed of the Gyro Blade, although bumping on walls will change the angle or the direction it travels. Gyro Blades are primarily used inside the Fortuna Castle and in the Mittis Forest, providing a way for the player.

Since Nero is the only character capable of controlling Gyro Blades. Missions 4 to 8 would have an advantage if the player uses the Gyro Blades to eliminate enemies faster.